CHICAGO -- Michigan will officially open fall camp in six days when all players report for duty in Ann Arbor on Sunday.

Unless some major movement happens, the Wolverines will open camp with no idea whether or not transfer running back Ty Isaac will be available this season.

Brady Hoke said Monday that Michigan still has heard nothing from the NCAA with regard to Isaac's hardship waiver request, and isn't sure when it will all be resolved.

"(There is no timetable) that I'm aware of yet," Hoke said Monday in Chicago. "Elizabeth Heinrich, our (NCAA) compliance director, is the one leading that charge with everything.

"But I can't tell you (when we'll know)."

Isaac, a 6-foot-3, 225-pound former five star recruit, transferred to Michigan from USC this offseason after one year on campus in Los Angeles. He rushed for 236 yards in 14 appearances last season as a freshman.

Part of the reason for Isaac's transfer was to move closer to his mother, who cannot fly in a plane due to complications from hearing loss surgery.

Isaac applied for a medical hardship waiver after his transfer, hoping to bypass the traditional transfer rule that forces a player to sit out a season before regaining eligibility.

Isaac's mother lives at the family home in Shorewood, Ill. -- which is roughly 250 miles away from Ann Arbor. That's about 150 miles more than the NCAA's desired length of 100 miles when it comes to hardship waiver requests.

The other thing that may be working against Isaac's quest to gain instant eligibility stems from the fact that complications from hearing surgery will not be viewed as a life-threatening or dire medical situation -- something the NCAA generally requires in these situations.

"I'm not going to speculate on (whether or not his chances of gaining eligibility are good or bad)," Hoke said. "Because I have no clue."

If Isaac does have to sit out this season, he'll be a sophomore with three years of eligibility remaining in 2015. At this point, he's set to report to campus with the rest of the team Aug. 3 and will be able to practice the following day with everyone else.

If he is granted eligibility, he'll likely immediately enter a running back competition with sophomores Derrick Green and De'Veon Smith, along with senior Justice Hayes, sophomore Drake Johnson and redshirt freshman Ross Douglas.